Weeds as vectors of disease and pests in organic production of leaf lettuce Lactuca sativa L. subsp. secalina Alef. (Asterales, Asteraceae)
2011
Ljevnaić-Mašić, B., Faculty of Agriculture, Novi Sad (Serbia) | Knežević, A., Faculty of Agriculture, Novi Sad (Serbia) | Džigurski, D., Faculty of Agriculture, Novi Sad (Serbia) | Stojanović, S., Faculty of Agriculture, Novi Sad (Serbia)
During the vegetation period of 2009 in organic production of leaf lettuce (Lactuca sativa L. subsp. secalina Alef.) in the open area 14 weed species were found. The investigation was made in the village of Kisač (Serbia). According to Kovačević J. (1976), the identified weed species are vectors of at least 64 taxa which are carriers of various diseases and pests (the least 18 fungi, 29 insects and 17 nematodes). The important vectors of diseases and pests, and thus the most undesirable weeds in leaf lettuce crop are: Amaranthus retroflexus, Chenopodium album, Cirsium arvense, Convolvulus arvensis, Sinapis arvensis and Stellaria media. It is necessary to prevent their growth with selective plucking, so that the weeds, which are not significant vectors of diseases and pests, would prevent draining of soil in the periods of drought. In addition, crops in crop rotations are the most important, and often the only measure in fighting weeds, diseases and pests.
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